GE ALPS - Page 114

2-50 ALPS Advanced Line Protection System
GE Power Management
2.4 INVERSE CURVES 2 CALCULATION OF SETTINGS
2
Figure 2–20: EXTREMELY INVERSE CURVE
0.01
0.1
1
10
100
0.1 1 10 100
MULTIPLES OF PICKUP
10
9
8
7
6
5
4
3
2
1
0.5
TIME (seconds)
TIME DIAL






−
=
2
1
825
M
.
TD)RESET(t






+
−
= 024340
1
645
2
.
M
.
TD)PU(t